Dr. Ross N. Gillanders Profile

Dr. Ross N. Gillanders

Senior Research Fellow at Univ of St Andrews

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 30 May 2022 Poster

Thermal control of organic semiconductor films for explosives detection

Edward Ogugu, Ross Gillanders, Graham Turnbull

Proceedings Volume PC12149, PC121491D (2022) https://doi.org/10.1117/12.2621638

KEYWORDS: Sensors, Organic semiconductors, Explosives detection, Molecules, Improvised explosive devices, Explosives, Excitons, Polymers, Luminescence, Land mines

Read Abstract +

Organic semiconductors have received increasing interest in sensing the explosive molecules emitted from landmines and improvised explosives devices (IEDs), especially when used as fluorescent sensors which are highly sensitive, easy to fabricate, and relatively cheaper when compared to other sensing technologies. Sensitivity down to ppb can be observed as quenching of photoexcited excitons in the fluorescent films, due to electron transfer from the excitons in the film to the nitroaromatic explosives molecules. However, for many organic fluorescent sensors, the quenching is irreversible or exhibits extremely slow reversibility due to strong binding interactions between the sensors and analytes, which imposes a limitation in terms of reusability. Here we present a study of the control of a fluorescent sensor’s temperature to overcome the binding interaction, and make the quenching reversible. Specifically, we study the thermal release of 2,4-DNT from the commercial fluorescent polymer, Super Yellow. Thermal cycling of the sensors results in recovery of fluorescence making them reusable. Interestingly, the release of 2,4-DNT occurs at a specific temperature which can be explored to discriminate which type of analytes are being released from the sensors. To optimise the sensors, blends of SY with Poly carbazole (PVK) were fabricated, and the thermal release of various nitroaromatic analytes were characterised. This method can be applied to other organic fluorescent sensors in a route to make them reusable, and give a selective response based on the temperature at which analytes are released.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years